Dec 4th Spiral Review

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. It has exactly two distinct positive divisors: 1 and itself.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

Front

What is the next prime number after 23?

Back

29.

Front

How do you round a number to the nearest thousand?

Back

Look at the hundreds digit: if it's 5 or more, round up; if it's less than 5, round down.

Front

What is 54,627 rounded to the nearest 1,000?

Back

55,000 because 54,627 is closer to 55,000 than 54,000.

Front

If you have 324 lemons and want to divide them equally among 5 friends, how many lemons does each friend get?

Back

Each friend gets 64 lemons.

Front

What is subtraction?

Back

Subtraction is the operation of removing objects from a collection. It is one of the four basic operations of arithmetic.

Front

What is the result of 1,297,504 - 567,724?

Back

729,780.

Front

What is a divisor?

Back

A divisor is a number that divides another number completely without leaving a remainder.

Front

What are the factors of 24?

Back

1, 2, 3, 4, 6, 8, 12, 24.